Abstract

Female Thrips setosus were reared under various combinations of temperatures (23°C, 18°C and 5°C) and photoperiods (15L-9D and 10L-14D) at diffferent stages and ages. Preoviposition period was examined to identify the presence of reproductive diapause and the conditions controlling induction and termination of diapause. Short-day photoperiod induced and maintained reproductive diapause, and both high temperature (23°C) and long-day inhibited diapause induction and maintenance. Reproductive diapause was never terminated under moderate temperature (18°C) and short-day, but it was terminated under the same photothermic conditions after low temperature (5°C) incubation for a certain period.

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